Year | Value | 2022 | 241,788 | 2021 | 249,783 | 2020 | 242,915 | 2019 | 236,192 | 2018 | 231,365 | 2017 | 232,456 | 2016 | 240,024 | 2015 | 247,803 | 2014 | 251,089 | 2013 | 251,030 | 2012 | 251,834 | 2011 | 253,191 | 2010 | 254,531 | 2009 | 257,078 | 2008 | 260,793 | 2007 | 263,326 | 2006 | 263,160 | 2005 | 262,849 | 2004 | 264,588 | 2003 | 266,983 | 2002 | 269,347 | 2001 | 275,785 | 2000 | 279,371 | 1999 | 273,623 | 1998 | 264,130 | 1997 | 253,810 | 1996 | 243,932 | 1995 | 235,518 | 1994 | 230,366 | 1993 | 228,636 | 1992 | 231,135 | 1991 | 237,033 | 1990 | 245,943 | 1989 | 260,339 | 1988 | 274,430 | 1987 | 283,420 | 1986 | 289,503 | 1985 | 292,928 | 1984 | 293,346 | 1983 | 291,778 | 1982 | 290,735 | 1981 | 291,206 | 1980 | 293,281 | 1979 | 296,361 | 1978 | 299,419 | 1977 | 299,835 | 1976 | 296,550 | 1975 | 290,170 | 1974 | 277,266 | 1973 | 257,632 | 1972 | 236,085 | 1971 | 215,971 | 1970 | 200,383 | 1969 | 194,409 | 1968 | 198,935 | 1967 | 208,275 | 1966 | 218,543 | 1965 | 228,692 | 1964 | 235,551 | 1963 | 237,856 | 1962 | 238,751 | 1961 | 238,510 | 1960 | 235,554 |
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